Thermal Bistability of an Ultrathin Film of Iron(II) Spin-Crossover Molecules Directly Adsorbed on a Metal Surface
| Autor: | Cristian Enachescu, Yann Girard, Massine Kelai, Philippe Sainctavit, Marie-Laure Boillot, M.-A. Arrio, Arthur Tauzin, Jérôme Lagoute, Sylvie Rousset, Edwige Otero, Talal Mallah, Weibin Li, Vincent Repain, Amandine Bellec |
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| Přispěvatelé: | Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)), Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Institut de Chimie du CNRS (INC)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Alexandru Ioan Cuza University of Iasi, University of Iasi, Grant of the Romanian ministry of research, Innovation and Digitization, CNCS/CCCDI-UEFISCDI, project N° PN-III-P4-ID-PCE-2020-1946, European Project: 766726,211587,COSMICS(2017), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), SOLEIL Synchrotron, L'Orme des Merisiers, 91198 Gif-sur-Yvette, France |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Absorption spectroscopy Bistability 02 engineering and technology Substrate (electronics) [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 01 natural sciences Condensed Matter::Materials Science symbols.namesake Thermal Bistability Spin crossover Monolayer General Materials Science [CHIM.COOR]Chemical Sciences/Coordination chemistry Physical and Theoretical Chemistry ComputingMilieux_MISCELLANEOUS Arrhenius equation Substrate Interaction Spintronics Mechanoelastic Model [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences X-ray Absorption Spectroscopy Spin-Crossover Chemical physics symbols [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] 0210 nano-technology |
| Zdroj: | Journal of Physical Chemistry Letters Journal of Physical Chemistry Letters, 2021, 12 (26), pp.6152-6158. ⟨10.1021/acs.jpclett.1c01366⟩ Journal of Physical Chemistry Letters, American Chemical Society, 2021, 12 (26), pp.6152-6158. ⟨10.1021/acs.jpclett.1c01366⟩ |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/acs.jpclett.1c01366⟩ |
| Popis: | Spin-crossover molecules are very attractive compounds to realize multifunctional spintronic devices. Understanding their properties when deposited on metals is therefore crucial for their future rational implementation as ultrathin films in such devices. Using X-ray absorption spectroscopy, we study the thermal transition of the spin-crossover compound FeII((3,5-(CH3)2Pz)3BH)2 from submonolayer to multilayers on a Cu(111) substrate. We determine how the residual fraction of high spin molecules at low temperature, as well as the bistability range and the temperature of switching, depends on the layer thickness. The most spectacular effect is the clear opening of a 35 ± 9 K thermal hysteresis loop for a 3.0 ± 0.7 monolayers thick film. To better understand the role played by the substrate and the dimensionality on the thermal bistability, we have performed Monte Carlo Arrhenius simulations in the framework of a mechanoelastic model that include a molecule-substrate interaction. This model reproduces well the main features observed experimentally and can predict how the spin-crossover transition is modified by the thickness and the substrate interaction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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